硅粉掺量对钢纤维硅粉混凝土力学性能的影响  

Influence of Silica Content on Mechanical Properties of Steel Fiber and Silica Concrete

作　　者：郝蓓蓓[1] 龚爱民[1] 彭玉林[1] 刘飞鹏[2] 

机构地区：[1]云南农业大学水利学院,云南昆明650201 [2]国家林业局昆明勘察设计院,云南昆明650201

出　　处：《水电能源科学》2016年第9期144-147,共4页Water Resources and Power

基　　金：云南省青年基金项目(2012FD024)

摘　　要：针对水工建筑物抗压强度要求及寒冷地区混凝土抗冻要求,研究了在等掺量钢纤维混凝土中加入不同掺量的硅粉,选取三个等级的混凝土,在满足和易性要求的前提下进行配合比试验,在2 000kN的压力试验机进行抗压强度试验、用KDR-V9混凝土快速冻融机进行冻融试验及DT-W18动弹性模量测定仪测定动弹性模量试验,确定力学性能最好的硅粉钢纤维混凝土配合比。结果表明,在钢纤维掺量为0.8%的混凝土中加入10%的硅粉,能够配制出力学性能相对较高的混凝土。Aiming at the compressive strength requirements of the hydraulic structures and the antifreeze requirements in the cold region,this paper studies adding different silica fume content into the same steel fiber reinforced concrete content.And then three different strength grades of concrete are selected to do the mix ratio test under the premise of satisfying the workability of concrete.Through the resistance test on pressure testing machine of 2 000 kN,the freeze-thaw test on freezing and thawing test machine of KDR-V9 and the dynamic modulus of elasticity test on DT-W18,the mix ratio of steel fiber and silica concrete with optimal mechanical properties is determined.The results show that mixing 10% silica powder in the 0.8% content of steel fiber concrete can make up concrete with good mechanical properties.

关 键 词：钢纤维 硅粉 抗压强度 冻融 

分 类 号：TU528.571[建筑科学—建筑技术科学]